What kind of lesion is a wheal?

• A. A flat, discolored patch
• B. A raised, itchy area of skin
• C. A blister filled with fluid
• D. A dry, scaly area

Answer: (B)

A wheal is characterized as a raised, itchy area of skin that typically results from an allergic reaction or irritation. This type of lesion is often temporary and can vary in size. Wheals are formed due to localized edema, which is the accumulation of fluid in the dermis, leading to swelling. This is often associated with conditions such as hives (urticaria) or insect bites, where the skin reacts to allergens or irritants.

The distinct raised quality and the associated itching are key features that set wheals apart from other skin lesions. For instance, a flat, discolored patch or a dry, scaly area would suggest different conditions, such as macules or patches associated with other dermatological issues, while blisters are typically fluid-filled lesions that do not present with the same raised feature characteristic of wheals. Understanding these distinctions is crucial for identifying and treating various dermatological conditions.